package com.erHuo.common.utils.vo;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * HTML转换
 * @author djx
 * @date 2016-1-14
 */
public class htmlChange {

	public String htmldecode(String html) {
		html = html.replace("&amp;", "&");
		html = html.replace("&lt;", "<");
		html = html.replace("&gt;", ">");
		html = html.replace("&mt;", "#");
		html = html.replace("&ft;", "'");

		return html;
	}

	public String htmlencode(String html) {

		html = html.replace("&", "&amp;");
		html = html.replace("<", "&lt;");
		html = html.replace(">", "&gt;");
		html = html.replace("#", "&mt;");
		html = html.replace("'", "&ft;");

		return html;
	}
	private static final String regEx_script = "<script[^>]*?>[\\s\\S]*?<\\/script>"; // 定义script的正则表达式
    private static final String regEx_style = "<style[^>]*?>[\\s\\S]*?<\\/style>"; // 定义style的正则表达式
    private static final String regEx_html = "<[^>]+>"; // 定义HTML标签的正则表达式
    private static final String regEx_space = "\\s*|\t|\r|\n";//定义空格回车换行符
       
    /**
     * @param htmlStr
     * @return
     *  删除Html标签
     */
    public static String delHTMLTag(String htmlStr) {
        Pattern p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE);
        Matcher m_script = p_script.matcher(htmlStr);
        htmlStr = m_script.replaceAll(""); // 过滤script标签
   
        Pattern p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE);
        Matcher m_style = p_style.matcher(htmlStr);
        htmlStr = m_style.replaceAll(""); // 过滤style标签
   
        Pattern p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
        Matcher m_html = p_html.matcher(htmlStr);
        htmlStr = m_html.replaceAll(""); // 过滤html标签
   
        Pattern p_space = Pattern.compile(regEx_space, Pattern.CASE_INSENSITIVE);
        Matcher m_space = p_space.matcher(htmlStr);
        htmlStr = m_space.replaceAll(""); // 过滤空格回车标签
        return htmlStr.trim(); // 返回文本字符串
    }
}
